public class Person {
    private int id;
    private String name;

    // 必须有无参构造方法和 getter/setter
    public Person() {}
    public Person(int id, String name) { this.id = id; this.name = name; }
    public int getId() { return id; }
    public void setId(int id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
}
